Tags give the ability to mark specific points in history as being important
`update_affine` is moved to the library script file `degrade` and is updated to account for the sign of the scale vector.
More robust support to keep field of view centered. Support for sub-mm resolution in-plane; uses SR factor over slice gap for integer finding. Added support for degrading 3D-acquired MRI.
Tagging version pre-sub-mm fix for reproducibility; in product, please use future versions.
Updated to handle sub-mm resolutions correctly. Also now has a `main.py` function to support containers.